<template>
      <div>
    
    <!-- 顶部滑动条区域 -->
    <div id="slider" class="mui-slider">
      <div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
        <div class="mui-scroll">
          <a :class="['mui-control-item', item.id == 0 ? 'mui-active' : '']" v-for="item in cates" :key="item.id" @tap="getPhotoListByCateId(item.id)">
            {{ item.title }}
          </a>
        </div>
      </div>

    </div>

    <!-- 图片列表区域 -->
    <ul class="photo-list">
      <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/' + item.id" tag="li">
        <img v-lazy="item.img_url">
        <div class="info">
          <h1 class="info-title">{{ item.title }}</h1>
          <div class="info-body">{{ item.zhaiyao }}</div>
        </div>
      </router-link>
    </ul>

  </div>
</template>
<script>
 // 1. 导入 mui 的js文件
 import mui from '../../lib/mui/js/mui.min.js'
 
 export default{
     data(){
         return{
             cates:[],// 所有分类的列表数组
             list:[] // 图片列表的数组
         };
     },
     created(){
         this.getAllCataegory();
         // 默认进入页面，就主动请求 所有图片列表的数据
         this.getPhotoListByCateId(0);
     },
     mounted(){//渲染之后样式
         mui(".mui-scroll-wrapper").scroll({
             deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
         })
     },
     methods:{
         getAllCataegory(){
             this.$http.get("api/getimgcategory").then(result=>{
                 if(result.body.status===0)
                 {
                      // 手动拼接出一个最完整的 分类列表
                      result.body.message.unshift({title:"全部",id:0});
                      this.cates=result.body.message;
                 }
             })
         },
         getPhotoListByCateId(cateId){
             this.$http.get("api/getimages/"+cateId).then(result=>{
                 if(result.body.status===0){
                     this.list=result.body.message;
                 }
             })
         }
     }   
 }
</script>
<style lang="scss" scoped>
*{
    touch-action: pan-y;
}
.photo-list{
    list-style: none;
    margin:0;
    padding: 10px;
    padding-bottom: 0;
    li{
        background-color: #ccc;
        text-align: center;
        margin-bottom: 10px;
        box-shadow: 0 0 9px #999;
        position: relative;
        img{
            width: 100%;
            vertical-align: middle;
        }
        img[lazy="loading"]{
            width: 40px;
            height: 300px;
            margin: auto;
        }

        .info{
            color: white;
            text-align: left;
            position:absolute;
            bottom:0;
            background-color: rgba(0,0,0,0.4);
            max-height:84px;
            .info-title{
                font-size: 14px;
            }
            .info-body{
                font-size: 13px;
            }

        }
    }
}
</style>

